According to the Mirror Online, it consists of just three questions. Before we tell you more about it, you can give it a go, below:

If you look like this after taking the test, it's probably not a good sign (Image: iStockphoto)

Question 1

A bat and a ball cost £1.10 in total. The bat costs £1.00 more than the ball. How much does the ball cost?

The options are: 15p, 10p and 5p.

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How much does the ball cost?

12000+ VOTES SO FAR

The odds are you answered 10p for this question - many people certainly do at first. This, however, is the WRONG answer.

If the ball costs X - and the bat costs £1 more - then it can be worked out like this:

X+£1

Therefore

Bat+ball=X + (X+1) =1.1

Thus

2X+1=1.1, and 2X=0.1

X = 0.05

Question 2

If it takes five machines five minutes to make five widgets, how long would it take 100 machines to make 100 widgets?

The options are: 100 minutes, 50 minutes and five minutes.

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How long would it take the machines to make 100 widgets?

14000+ VOTES SO FAR

It's tempting, if answering these quickly, to guess 100 minutes.

But this isn't the right answer.

Instead, if five machines can make five widgets in five minutes, then one machine will make one widget in five minutes too.

Therefore if we have 100 machines all making widgets, they can make 100 widgets in five minutes.

Question 3

In a lake, there is a patch of lily pads. Every day, the patch doubles in size.

If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

The options are: 24 days, 47 days and 36 days.

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How long does it take for the patch to cover half of the lake?

12000+ VOTES SO FAR

While many people might have answered 24 days, the answer goes as follows.

If the patch doubles in size each day going forward, it would halve in size going backwards. So on day 47, the lake is half full.

So, how did you do?

If you got all three right, then well done you!

But please don't worry if you got any wrong, or indeed all of them. The aim of the test is to assesses individuals' ability to suppress an intuitive and spontaneous wrong answer, in favor of a reflective and deliberative right answer.

So, in theory, if you got anything wrong, it's only because you were trying to answer a bit too quickly and, with a bit more time, you'd have probably figured it out.